package com.chenjf.util;

import java.io.PrintStream;
import java.security.MessageDigest;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

public class MD5
{
  private static final String[] hexDigits = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };

  public static String byteArrayToHexString(byte[] b)
  {
    StringBuffer resultSb = new StringBuffer();
    for (int i = 0; i < b.length; i++) {
      resultSb.append(byteToHexString(b[i]));
    }
    return resultSb.toString();
  }

  private static String byteToHexString(byte b) {
    int n = b;
    if (n < 0)
      n = 256 + n;
    int d1 = n / 16;
    int d2 = n % 16;
    return hexDigits[d1] + hexDigits[d2];
  }

  public static String MD5Encode(String origin) {
    String resultString = null;
    try
    {
      resultString = new String(origin);
      MessageDigest md = MessageDigest.getInstance("MD5");
      resultString = byteArrayToHexString(md.digest(resultString
        .getBytes()));
    } catch (Exception ex) {
      System.out.println("加密错误");
    }
    return resultString;
  }
  public static void main(String[] args) {
    try {
      String userid = "34000744";
      DateFormat df = new SimpleDateFormat("yyyyMMdd");
      Date date = new Date();
      String tempPwd = MD5Encode("zkjs2018");
      System.out.println(tempPwd);
    }
    catch (Exception e) {
      e.printStackTrace();
    }
  }
}